Smart sensor AR320 Infrared Thermometer LCD Display Digital Thermometer in Pakistan BR2933 Description: The most basic design consists of a lens to focus the infrared (IR) energy onto a detector, which converts the energy to an electrical signal that can be displayed in units of temperature after being compensated for ambient temperature variation. Features: Light weight and easy operation. Measurement Temperature range: -32C ~ 380C ( -26°F ~ 716°F ). Response Time & Wavelength: 500ms & 95% response. Press and hold the button, this thermometer will read the current surface temperature in 0.5 second